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InstantDB: Foreign key problems...


I have a bried question regarding foreign keys.
I'm attempting to add a foreign key constrain on a table such as in the example below.  My problems is as follows:

The following two CREATE TABLE DDL commands succesfully create the foreign key and associated constraints:


e CREATE TABLE employee (
    employee_id CHAR(10) UNIQUE PRIMARY KEY NOT NULL,
    project_id CHAR(10) REFERENCES project (project_id) ON DELETE CASCADE,
        emp_first_name CHAR(15),
    emp_last_name CHAR(30),
    emp_address_1 CHAR(50),
        emp_address_2 CHAR(50),
        ....
        emp_zip CHAR(9),
    emp_age INT );



e CREATE TABLE employee (
    employee_id CHAR(10) UNIQUE PRIMARY KEY NOT NULL,
    project_id CHAR(10),
        emp_first_name CHAR(15),
    emp_last_name CHAR(30),
    emp_address_1 CHAR(50),
        emp_address_2 CHAR(50),
        ....
        emp_zip CHAR(9),
    emp_age INT ) FOREIGN KEY (project_id) REFERENCES project (project_id) ON DELETE CASCADE;

---------------------------------

HOWEVER THE LINE BELOW DOES NOT (according to the syntax outlined in the BNF in the accompanying documentation this SHOULD work):

e ALTER TABLE employee ADD FOREIGN KEY (project_id) REFERENCES project (project_id) ON DELETE CASCADE;


Is this a known bug or is something else wrong?  Any help would be greatly appreciated.

Todd

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